I am Evan Chen, an MIT grad student and math olympiad coach. You can find me in the following places:
I'm also an amateur programmer, I guess.
Errata for Euclidean Geometry in Math Olympiads
I am Evan Chen, an MIT grad student and math olympiad coach. You can find me in the following places:
I'm also an amateur programmer, I guess.
It is important that x + y + z = 1 when doing calculations with displacement vectors. (p. 126)
Easily achievable alternatives:
Things to be considered:
Creating a separate issue so I can track these. From @annnagatsuki
Additional ToDos:
Reword p. 126: “It is important that x + y + z = 1 when doing calculations with displacement vectors” should be “… x + y + z = 0 ….”
Solution to Example 7.30: an abuse of notation in defining the coordinates of point P.
There is a definition of two circles being orthogonal but no definition of a circle being orthogonal to another circle.
There is no definition of the complete quadrilateral being cyclic such as the one in tr011ey.
p. 274:isogonal with respect to \angle{BAC}'' is undefined in this book. Solution 11.11:
the angle bisector''.
Solution 10.30: This logic of the first sentence seems very strange to me. The analogous calculation does not imply the second expression and the second one itself will not give the third one. Even if the subject of the relative clause should be interpreted as “the analogous calculation,” which would make some sense to me, the former issue still does not resolve at all. Above all, this introduction might imply that “directed SAS” is going to be used to show the similarity, even though we are going to show accordingly with the definition itself by using cyclic permutations of indices.
The errata in TeX format should be synchronized to the one in PDF format.
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